java.lang.NullPointerException: Attempt to read from field 'int android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left' on a null object reference

google.com | 4 months ago
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    RecyclerView ViewPager java.lang.NullPointerException android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left

    Stack Overflow | 1 year ago | Stefan Dekanski
    java.lang.NullPointerException: Attempt to read from field 'int android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left' on a null object reference
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    Stack Overflow

    xluat.com | 1 year ago
    java.lang.NullPointerException: Attempt to read from field 'int android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left' on a null object reference
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Root Cause Analysis

  1. java.lang.NullPointerException

    Attempt to read from field 'int android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left' on a null object reference

    at android.support.v7.widget.SimpleItemAnimator.animateChange()
  2. Android v7
    RecyclerView.onLayout
    1. android.support.v7.widget.SimpleItemAnimator.animateChange(SimpleItemAnimator.java:130)
    2. android.support.v7.widget.RecyclerView.animateChange(RecyclerView.java:3062)
    3. android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2924)
    4. android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3071)
    4 frames
  3. Android Platform
    ViewGroup.layout
    1. android.view.View.layout(View.java:16630)
    2. android.view.ViewGroup.layout(ViewGroup.java:5437)
    3. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
    4. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
    5. android.view.View.layout(View.java:16630)
    6. android.view.ViewGroup.layout(ViewGroup.java:5437)
    6 frames
  4. Android Support v4
    ViewPager.onLayout
    1. android.support.v4.view.ViewPager.onLayout(ViewPager.java:1627)
    1 frame
  5. Android Platform
    ViewGroup.layout
    1. android.view.View.layout(View.java:16630)
    2. android.view.ViewGroup.layout(ViewGroup.java:5437)
    2 frames
  6. android.support.design
    CoordinatorLayout.onLayout
    1. android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1037)
    2. android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:747)
    3. android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
    4. android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1156)
    5. android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:760)
    5 frames
  7. Android Platform
    FrameLayout.onLayout
    1. android.view.View.layout(View.java:16630)
    2. android.view.ViewGroup.layout(ViewGroup.java:5437)
    3. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
    4. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
    5. android.view.View.layout(View.java:16630)
    6. android.view.ViewGroup.layout(ViewGroup.java:5437)
    7. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
    8. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
    8 frames
  8. com.flipboard.bottomsheet
    BottomSheetLayout.onLayout
    1. com.flipboard.bottomsheet.BottomSheetLayout.onLayout(BottomSheetLayout.java:208)
    1 frame
  9. Android Platform
    ViewGroup.layout
    1. android.view.View.layout(View.java:16630)
    2. android.view.ViewGroup.layout(ViewGroup.java:5437)
    2 frames
  10. Android Support v4
    DrawerLayout.onLayout
    1. android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1043)
    1 frame
  11. Android Platform
    FrameLayout.onLayout
    1. android.view.View.layout(View.java:16630)
    2. android.view.ViewGroup.layout(ViewGroup.java:5437)
    3. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
    4. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
    5. android.view.View.layout(View.java:16630)
    6. android.view.ViewGroup.layout(ViewGroup.java:5437)
    7. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
    8. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
    9. android.view.View.layout(View.java:16630)
    10. android.view.ViewGroup.layout(ViewGroup.java:5437)
    11. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
    12. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
    13. android.view.View.layout(View.java:16630)
    14. android.view.ViewGroup.layout(ViewGroup.java:5437)
    15. android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
    16. android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
    17. android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
    18. android.view.View.layout(View.java:16630)
    19. android.view.ViewGroup.layout(ViewGroup.java:5437)
    20. android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
    21. android.widget.FrameLayout.onLayout(FrameLayout.java:273)
    21 frames
  12. Android
    PhoneWindow$DecorView.onLayout
    1. com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678)
    1 frame
  13. Android Platform
    Choreographer$CallbackRecord.run
    1. android.view.View.layout(View.java:16630)
    2. android.view.ViewGroup.layout(ViewGroup.java:5437)
    3. android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171)
    4. android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
    5. android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
    6. android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
    7. android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
    7 frames